On Mon, Dec 05, 2011 at 11:00:41AM +0800, joeyli wrote:
> Add Cc. to platform-driver-x86 and linux-acpi
> 
> Hi Baptiste
> 
> 於 日，2011-12-04 於 17:07 +0100，Baptiste Jonglez 提到：
> > Hi,
> > 
> > I've got a lot of troubles with a dual-LVDS Acer laptop (it doesn't
> > have a keyboard, but two displays with touchscreens)
> > 
> > The Intel GPU is integrated into the Core i5-480M CPU: it's a bit
> > older than Sandybridge, as it seems to be based on the Arrandale
> > micro-architecture.
> > 
> > In the BIOS, both displays work fine; but as soon as the kernel boots
> > up, the second display (i.e. the one where you usually find a
> > keyboard) is turned off. The main display works as expected.
> > 
> > xrandr reports two LVDS displays: LVDS1, which is connected, and
> > LVDS2, which is marked as "disconnected". No matter what I tried, I
> > can't bring that second display up.
> > 
> > During the boot, just after the drm is set up, the following message
> > shows up:
> > 
> >   [drm:intel_dsm_pci_probe] *ERROR* failed to get supported _DSM functions
> > 
> > (attached is the relevant part of dmesg [1])

The second screen works fine with the attached patch. It actually is
6 months old but seems to have been lost in the wild...

Thanks Benjamin!

There is still the issue of unhandled acer-wmi events, but it's far
less incapacitating. I wonder what's the best way to report events to
userspace, though (e.g. for the "keyboard" button, userspace might
want to know when it is pressed in order to display a virtual keyboard
or any other fancy stuff)

Joey, if you need more logs for acer-wmi, I'll be happy to provide.


Baptiste